MALICIOUS
254
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains multiple links to redirector infrastructure, specifically designed to host fake download pages. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a pattern of distributing malicious content through SEO-optimized links. The ML classifier and ClamAV detection further support the malicious nature of this PDF, likely used as a lure for phishing or to deliver a second-stage payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9059
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILEDThe cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL https://yafferge.ru/award?keyword=mims+medical+microbiology+pdf+download In PDF document text
- https://static.s123-cdn-static.com/uploads/4455387/normal_5ff17a1902c4e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4466140/normal_5fc7e0ccbcab3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453329/normal_60621787e77ec.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370051/normal_60312f9d3d037.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4474746/normal_5ff0d2383f786.pdfIn PDF document text
- http://segilajobugulof.iblogger.org/how_to_use_predictive_analysis.pdfIn PDF document text
- http://fukuzowi.sportsontheweb.net/guzukozigijopinosa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4493600/normal_6025b0b19116d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4380525/normal_5ff0d0899d027.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375353/normal_5fd89a1934444.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418367/normal_60220a61a6c94.pdfIn PDF document text
- http://bivozebavi.iblogger.org/kano_model_template_xls.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481408/normal_5ffef2c65d904.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fibalikirikoti.epizy.com/38591981560.pdfIn PDF document text
- http://pekafujojef.onlinewebshop.net/57336799000.pdfIn PDF document text
- https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_07862643e3b14ee19e289c94611b487f.pdf?index=trueIn PDF document text
- http://xipaxozudagigub.epizy.com/christmas_art_projects_for_high_school_students.pdfIn PDF document text
- https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_beaa66570f2f4725811909b9e79fbcc6.pdf?index=trueIn PDF document text
- https://d926c97b-7f3b-4ec8-a52a-318bcb589338.filesusr.com/ugd/120f26_5390f96d2f944fce9c0123f2f49e0303.pdf?index=trueIn PDF document text
- http://woxesizefibugel.atwebpages.com/faxiseragibixifazejuluw.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000f7b6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF7B6 | 2828 bytes |
SHA-256: 2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553 |
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font_01_sfnt_off000101bf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x101BF | 5812 bytes |
SHA-256: bdb03aaf5ea58b2a4ac8d231696c7b34005932b5e1564ecf5a8b717e3151c7b7 |
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font_02_sfnt_off00011593.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11593 | 11380 bytes |
SHA-256: 0bfdf06e3ac4daaad7cde641e4dff166cff4063429f45cddd60243f31d66773e |
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